Cheap flights from Idaho Falls to Washington from $36

The month of January is, on average, the cheapest month to fly to State of Washington from Idaho Falls, with most prices found around $88. If you aren’t able to travel to State of Washington during the month of January, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $98.

The cheapest day to depart from Idaho Falls to State of Washington is on a Thursday. Travelers who choose to depart for State of Washington on a Thursday will often find tickets for as low as $409. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Idaho Falls to State of Washington for around $509.

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $401. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $459 on average. Flights to State of Washington from Idaho Falls in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Idaho Falls Fanning Field to Seattle/Tacoma Intl for the best Idaho Falls Fanning Field - Washington flight prices

You are more likely to see cheaper flights to State of Washington from Idaho Falls when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $322 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Idaho Falls for as low as $242 on momondo.

There are 4 cabin classes available to choose from on Idaho Falls to State of Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Alaska Airlines and Delta are the most popular carriers operating from Idaho Falls Fanning Field to Washington

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to State of Washington from Idaho Falls according to our data. Alaska Airlines is the first choice among our users, with 77% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 4 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

As of June 2026, there are 4 flights per day flying from Idaho Falls to State of Washington. The most common time of day flights depart is 1:00PM, with 54% of flights taking off in the afternoon.

The number of flights available between Idaho Falls and State of Washington is 31 per week as of June 2026. The most frequent departure day is Mon, with 19% of weekly flights leaving on this day.